I am color-blind, can't see small amount of red's in a big picture.
A little bit also digit-blind, can't see the triple you have not mentioned.

If I don't see it, it does not mean that it is not there.
I am also not claiming that this is the ONLY or the SHORTEST solution.

Can you point for me the "red triple" more acurate?
Thank you,

see u,

P.S. if you need some other training examples, just tell me. You could work on the "Super Tough" examples of "Krazydad" (Free Printable Sudoku Puzzles by Jim Bumgardner), but some of them are extreme difficult even for this techniques. Most of them are excellent.
[I got only up to book 8]